Since my 1994 van b250 been converted from an R12 system to a R134 system, the ac has not been blowing air as cold as when it was an r12 system. Do i need to change the condenser unit to a bigger, more efficient one? Is there any other unit i can retrofit my system to get colder air?

Thanks,

Alex

 

while converting from 12 to 134 can be successfully done, here are some points are really need to be addressed so it can work right

1. Compressor. You really cannot use an old compressor when converting. R12 Pressure on the high side is only about 200 PSI. R134 goes up to 330 psi. So if you compressor cannot get up this high, it will not be cold
2. Oil. r12 and r134 oils are different and incompatible. Before conversion a total flush of all components is needed. Since you never can get all the oil out of the compressor, a replacement should be done for the foremetioned number one reason and this reason also. When the oils mix, they foam, causing significant performance degradation.
3. The accumulator or dryer must be replaced. No exceptions. There is way too much oil and junk in them.

If you follow these three steps, conversion will be successful. If you didn't done even one of these, poor performance will result.

 

Thank you for the quick reply.

All the components you mentioned were changed when the conversion was done. They are all r134a components. I was told by an ac technician that a bigger condenser coil might help with cooling the freon going thru there.

 

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absolutely agree...it is really hard to charge these systems right.

 

Another problem I'm having with my ac is that I would have my fan on full blast and you could fell air coming out of the vents, but when I accelerate, no air would come out until I ease out of the gas pedal. What would be causing this phenomenon?

 

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Thanks for the reply. I will start looking for vacuum leaks.

 

Most likely the vacuum leak is the hose coming off of a vaccum tee on the passanger side intake manifold that goes over and behind the PCM towards the drivers side. It is a black thin vacuum line and in my observations this line deteriorates and becomes brittle. Find this line and replace most of it, you need to leave about 4 to 6 inches off of the fire wall and if you take a piece of it to your local auto parts store they can get you a small size rubber hose to slide over the vacuum line that is left by the fire wall.